<ui:composition xmlns="http://www.w3.org/1999/xhtml"
   xmlns:ui="http://java.sun.com/jsf/facelets"
   xmlns:p="http://primefaces.org/ui"
   template="/templates/leftmenu.xhtml">
     
  <ui:define name="content"> 
       <p:menu type="plain">
             <p:menuitem value="人员" url="helloworld.xhtml" target="work_area"/>
             <p:menuitem value="产品" url="helloworld.xhtml" target="work_area"/>
             <p:menuitem value="库房" url="helloworld.xhtml" target="work_area"/>
             <p:menuitem value="库存" url="helloworld.xhtml" target="work_area"/>
             <p:menuitem value="单据" url="helloworld.xhtml" target="work_area"/>
             <p:menuitem value="统计" url="helloworld.xhtml" target="work_area"/>
       </p:menu>
       
  </ui:define>
    
</ui:composition>